The financial windfall means work could start on the scheme – a replacement for Snøhetta and Spence Associates’ doomed ‘pebble’ project – in October.
The previous design, which would have sat in the North Sea, was ditched by project backers Kent County Council when the budget spiralled to £50 million, nearly three times the original estimate.
Chipperfield’s scheme will be clad in white opaque recycled-glass cladding and will feature six interlocking blocks, easing movement around the gallery, which will house works by JMW Turner.
Mike Hill, Kent County Council’s cabinet member for community services, who is leading the project on behalf of the authority said: 'The Arts Council and SEEDA have been supportive of everything that we are trying to achieve with Turner Contemporary since the outset.
‘These funding agreements demonstrate our partners’ confidence in the project and the impact it is going to have on the whole area.’